在不同的晶粒尺寸、裂变率条件和温度、应力范围下，UN的介观蠕变机制不同，辐照和温度的影响也不同。在高温、高应力区主要是位错湮灭机制主导，应力较低或温度较低时主要是空位扩散机制主导，虽然存在过渡区，但存在完全由一种机制主导的区域。在考虑辐照的情况下，在温度较低时主要是辐照蠕变占主导，温度较高时主要是热蠕变占主导。

The effects of irradiation and temperature on the mesoscopic creep mechanism of UN are different under different grain size, fission rate, temperature and stress range. The dislocation annihilation mechanism is dominant in high temperature and high stress region, and the vacancy diffusion mechanism is dominant in low stress or low temperature region. When the irradiation is considered, the radiation creep is dominant at low temperature, and the thermal creep is dominant at high temperature.